Work Power
Authored by Lisa Thompson
Science
8th Grade
NGSS covered
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25 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A kid throws a ball with a force of 70N over 1.1 meters. How much work did he do?
77 joules
70 joules
7.7 joules
11 joules
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The formula for work is
work/time (P = W/t)
force × distance (W = Fd)
distance/time (s = d/t)
mass × acceleration (F = ma)
Tags
NGSS.MS-PS3-5
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The formula for power is
work/time (P = W/t)
force × distance (W = Fd)
distance/time (s = d/t)
mass × acceleration (F = ma)
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Use one of these equations to answer this question (W = Fd) and (P = W/t): When Aang fights Ozai, he wields 100,000 Joules in 25 seconds. What is his power?
4,000 J/s (Watts)
250,000 J/s (Watts)
125,000,000 Newtons
2,000,000 Joules
Tags
NGSS.HS-PS3-1
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The rate at which work is done is ____.
power
force
efficiency
momentum
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
You do 90 joules of work in 30 seconds. How much power have you generated?
30 watts
3 watts
120 watts
270 watts
Answer explanation
Power is calculated as work done divided by time. Here, power = 90 joules / 30 seconds = 3 watts. Therefore, the correct answer is 3 watts.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of these is a measurement of power?
100 joules
100 watts
100 meters per second
100 hertz
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